G05-802

[t8erbug]

Looking for some direction. Ive never worked on an X-Y. I printed off the manual but I think I'm going to need more than that. it looks as if everything is pushed over to the right hand side of the screen. If you turn the brightness up you can see lights moving over there. The spot killer LED  is dimly lit.

Any ideas?

Fired the machine up again today. There is a vertical line down the middle of the screen. It looks as if the game is playing, but everything is scrunched into a 1/16" line.

 

[D_Zoot]

You have lost an axis of deflection.  While this problem could possible be on the game board, it's almost always a monitor fault.

The most common cause is either bad solder joints on the deflection board, or one of the TO3 transistor (often referred to as the "bottlecap" transistors) mounted on the frame has gone bad on you.  In many cases when one of these transistors goes out it usually shorts, then pops the fuse for that axis.

Without doing any sort of testing, the easiest way to handle one of the monitors is to get a whole "rebuild kit", with transistors.  Bob Roberts sells them, among others.  These kits contain all the parts need to get fresh caps on the chassis and replace the common failure items.  While you are installing the kit you can reflow the solder joints for the header pins and any other suspect appearing solder joint.

If you don't want to go that route, there is an X-Y monitor FAQ available for download at a number of places (just google for it). It will work you through testing the transistors, I'm betting you either have a bad solder joint or shorted deflection transistor.


Good luck!
D